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Textual question: (Page no.92) Q.1. Name five metals and non-metals . Ans:-   Five metals : sodium, potassium, aluminium, …

Let us answer these: Page 70 (1) A solution of an oxide “X” is used for white washing. (a) What could be “X”? Write it…

Chapter 1: Let us answer these: (Page-3) Chapter 1: Let us answer these: (Page-6) Chapter1: Lets us answer these …

Chapter 3: Let us answer these (Page-40) Chapter 3: Let us answer these (page 47) Chapter 3: Let us answer these…

Chapter2: Let us answer these (page-28) Chapter2 : Let us answer these (Page-35) Chapter 2: Textual Exercises

Let us answer these: (Page-3) Q1. What is Dobereiner's law of triads? Give one example. Ans:  When elements are…

Q1. What was Mendeleev's principle for the classification of elements? Ans:    1) Mendeleev's table was based…

Q1. What name has been given to the horizontal arrangement of elements in the periodic table? Is there any gradation in …